Apparatus for molding building blocks



May 10, 1949. A. H. HAWES APPARATUS FOR MOLDING BUILDING BLOCKS 2 Sheets-Sheet 1 Filed Jan. 9, 1946 37 l as AQEN'T y 1949. A. H. I-IAWES 2,469,599

APPARATUS FOR MOLDING BUILDING BLOCKS Filed Jan. 9, 1946 2 Sheets-Sheet 2 FLGLQ as 36 20, as E 5%;- I as 37 33 3! 33 37 irfvzm'ow Patented May 10, 1949 UNITED STATES PATENT OFFICE APPARATUS FOR MOLDING BUILDING BLOCKS Application January 9, 1946, Serial No. 639,952 In Great Britain January 17, 1945 8 Claims.

This invention relates to apparatus for moulding building blocks from concrete, breeze or the like, which blocks are of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, which transverse block portions may comprise, for example, wire ties or web portions integral with the wall members of the block.

Apparatus for moulding building blocks of the above type has already been proposed wherein the mould is provided with one or more hinged side walls which after moulding are displaced away from the block to permit of same being removed from the mould.

The primary object of the present invention is to provide an improved construction wherein such hinged side walls to the mould are avoided so that a simpler and stronger construction of mould can be used.

A further object of the present invention is to provide a generally improved construction of mould which enables an improved building block of the above type to be produced.

Other objects of the invention will become apparent from the following description and claims of the specification, in the accompanying drawings of which- Figure 1 is a plan view of the upper portion of a machine arranged for production of one form of block of the type specified.

Figure 2 is a sectional side elevation of the same, whilst Figures 3 and 4 are transverse sectional views of the machine, showing the moulded block during tamping and after ejection, respectively.

Figure 5 is a perspective view of a preferred form of pallet, and

Figure 6 is an end view of a modified pallet for use with a multiple core.

Figure 7 is a plan View of the mould employed for the production of an angle or corner blocks of the type specified.

Figures 8 and 9 are views corresponding to Figures 2 and 3 respectively, but showing the mould modified for the production of a further form of block of the type specified.

The present invention is applicable to the manufacture of cavity building blocks of the type hereinbefore specified, in which the transverse block portions comprise wire ties, or alternatively integral, concrete webs extending transversely across the central cavity between the wall members of the block.

- Figures 1 .to 4 illustrate the improvedmoulding apparatus as arranged for manufacturing a building block of the type specified, and consisting of two moulded wall members 20 spaced apart to provide a cavity 2| therebetween by means of transverse block portions'in the form of wire tie members 22, each wire tie member being in the form of a rectangular frame comprising two horizontal limbs and two vertical limbs, which latter become embedded in the concrete or other cast material, as shown in Figures 3 and 4. v

The moulding box illustrated in Figures 1 to 4 consists of a'statlonary base 28, two lateral walls 29, and two end walls 30, the base having fixed thereto a core member 3| in which are a number of vertical slots 32 each adapted to receive one of the rectangular wire frames 22 aforesaid.

Within the moulding box is a movablebase or ejector 33 formed in two parts which extend between the end walls 30 at opposite sides of the core member 3| and are acted upon by suitable mechanism such as the push-rods 34, this mechanism, one operation of a manual or other control, causing the base 33 to be raised from the position shown in Figure 3 to that shown in Figure 4.

The mould proper may be bounded by the walls of the box and/or by liners 35 associated with some or all of such walls, the walls 29, 30 being fixed to the base 28 and the liners 35, if used, also remaining stationary when the movable base 33 is raised, being preferably secured by screws 36 to the walls 29, 30 which in turn are bolted at 31 to the base 28. v

The movable base 33 carries a pallet 33 consisting of two spaced longitudinal members of wood or other material on which thewall members 26 are moulded, these members being connected by two or more bridge-pieces 39 extending through the core slots 32 beneath the tie members 22 supported therein.

The particular arrangement illustrated is intended for the simultaneous production of a pair of cavity blocks, and for this reason the core member 3| is formed with a central vertical slot lllextending down. to the upper surfaces of the palletmembers 38 and receiving a partition member M which divides the mould proper into two equal parts. At each side of this; partition the core member 3| is formed with twoof the slots 32 aforesaid, and the 'endmostof these slots are made deeper than the others to accommodate the pallet bridge-pieces 39. 9

Conveniently each such bridge-piece 39-com tending completely between an opposed pair of mould walls, said core being adapted to form between the wall members of the block a similarly extending cavity, pallet members on each of said movable base parts extending correspondingly to said core completely between the said opposed mould walls, said core having transverse vertical slots extending downwardly from its upper edge, some of said slots being adapted to receive said transverse block portions, a partition member located in another of said slots dividing said mould into a plurality of compartments, bridge pieces connecting said pallet members at opposite sides of the core extending through said slots, said bridge pieces being adapted each to support one of the said transverse block portions, and means for raising said movable base and pallet members thereon to bring the moulded block clear of the mould walls leaving the latter and the core stationary.

4. Apparatus for moulding building blocks of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, said apparatus, comprising a mould including a stationary base and side walls, and movable tamping member, a core projecting from said stationary base for forming the cavity between the wall members of the block, a pair of movable pallet members disposed one on each side of said core, the latter having transverse vertical slots extending downwardly from its upper edge, said slots being adapted to receive said transverse block portions, bridge pieces connecting said pallet members at opposite sides of the core eX- tending through said slots, said bridge pieces being adapted each to support one of the said transverse block portions, and means for raising said movable pallet members to bring the moulded block clear of the mould walls leaving the latter and the core stationary.

5. Apparatus for moulding building blocks of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, said apparatus, comprising a mould including a stationary base and side walls, and movable tamping member, a core projecting from said stationary base for forming the cavity between the wall members of the block, a pair of movable pallet members disposed one on each side of said core, the latter having transverse vertical slots extending downwardly from its upper edge, said slots being adapted to receive said transverse block portions, sheet metal bridge pieces connecting said pallet members at opposite sides of the core extending through said slots, said bridge pieces being adapted each to support one of the said transverse block portions, and means for raising said movable pallet members to bring the moulded block clear of the mould walls leaving the latter and the core stationary.

6. Apparatus for moulding blocks of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, said apparatus, comprising a mould including a stationary base and side walls, and movable tamping member, a core projecting from said stationary base and extending completely between an opposed pair of mould walls, said core being adapted to form between the wall members of the block a similarly extending cavity, a pair of movable pallet members disposed one on each side of said core, the latter having transverse vertical slots extending downwardly from its upper edge, said slots being adapted to receive said transverse block portions, bridge pieces connecting said pallet members at opposite sides of the core extending through said slots, said bridge pieces being adapted each to support one of the said transverse block portions, and means for raising said movable pallet members to bring the moulded block clear of the mould Walls leaving the latter and the core stationary.

7. Apparatus for moulding building blocks of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, said apparatus, comprising a mould including a stationary base and side walls, and movable tamping member, a core projecting from said stationary base for forming the cavity between the wall members of the block, a pair of movable pallet members disposed one on each side of said core, the latter having transverse vertical slots extending downwardly from its upper edge, said slots being adapted to receive said transverse block portions, bridge pieces connecting said pallet members at opposite sides of the core extending through said slots, said bridge pieces projecting above the upper face of said pallet members and being adapted each to support one of the said transverse block portions, and means for raising said movable pallet members to bring the moulded block clear of the mould walls leaving the latter and the core stationary.

8. Apparatus for moulding building blocks of the type comprising a pair of wall members connected together so as to provide a cavity therebetween by means of transverse block portions, said apparatus, comprising a mould including a stationary base and side walls, and movable tamping member, a core projecting from said stationary base and extending completely between an opposed pair of mould walls, said core being adapted to form between the wall members of the block a similarly extending cavity, a pair of movable pallet members disposed one on each side of said core, the latter having transverse vertical slots extending downwardly from its upper edge, said slots being adapted to receive said transverse block portions, bridge pieces connecting said pallet members at opposite sides of the core extending through said slots, said bridge pieces projecting above the upper face of said pallet members and being adapted each to support one of the said transverse block portions, and means for raising said movable pallet members to bring the moulded block clear of the mould walls leaving the latter and the core stationary.

ALBERT HENRY HAWES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Nlunber Name Date 1,631,901 Threadgill June '7, 1927 2,298,006 George Oct. 6, 1942 2,341,012 Billman et a1. Feb. 8, 1944 FOREIGN PATENTS Number Country Date 461,249 France 1913 

